code: def setUpClass(cls):
      cls.kwargs = {
          "connection_data": {
              "credentials_file": "mindsdb/integrations/handlers/gmail_handler/credentials.json",
              "scopes": [
                  "https://www.googleapis.com/auth/gmail.readonly"
              ],
          }
      }
  
      cls.handler = GmailHandler("test_gmail_handler", **cls.kwargs)
  
file_path: mindsdb/mindsdb/integrations/handlers/gmail_handler/tests/test_gmail_handler.py
imports: from mindsdb.integrations.handlers.gmail_handler.gmail_handler import GmailHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
  import unittest
label_desc: Use image node_id 1 for calling the EmailsTableTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types